How to deal with my insecurities dating a person who used to be poly?
I (31) have been with my boyfriend (39) for 10 months now. He was previously married monogamous, his ex wife realized she was bi and they started a poly relationship with others for 5 years before they divorced. He since has been monogamously dating for the last 3 years before meeting me.
I myself am divorced for 2 years from a long toxic marriage that involved addiction issues and infidelity from my partner. I spent a year after my divorce really focusing on myself, healing, not dating and being in therapy.
When I first met my boyfriend, he told me his history and I was initially fine with it. But now that I am really falling deeply in love with him and we are starting to intertwine our lives together, I find myself with growing insecurities about his poly past. I get such dark thoughts about him having multiple long term girlfriends at the same time, sharing threesomes and kinks, their alt lifestyles at goth clubs and sex parties, the 'i love you's' they shared, and how he was in poly relationships without his ex wife.
Although he is no longer poly, I believe he still carries some remnants of those values in his current lifestyle today, such as being friends with that poly social group (although no longer clubbing or partying with them), staying friends with those exes, and not having strong boundaries with other women (as long as it's not cheating, it's okay).
I know he no longer lives a poly life, but the thoughts really tug at my insecurities and it has been so difficult to let them go. I compare myself to these women, like how did he love them so quickly but it took us six months? Is our sex life not as fulfilling because it's more fun with a third person who is probably way more experienced than me? Am I enough? His personality is why I was so drawn to him in the first place, and his past is what made him who he is today. But how do I get past my negative thoughts about it?
I'd love to hear if anyone has experienced something similar, either like myself dating a formerly poly person or as the person who left poly and is back to monogamously dating.